Keysight E4981A Programming Manual page 35

Overview of Remote Control
USB Remote Control System
Step 2. In the Instruments screen the connected USB device is auto detected.
Figure 2-10 USB device is auto detected
Step 3. Click Add or Change Aliases to change the VISA alias.
Figure 2-11
Edit existing VISA alias
Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter 35